Which sentence correctly uses used to in the affirmative form?

✂️ a) She used to be going to the gym every day.

✂️ b) He was used to drink coffee in the mornings.

✂️ c) They are used to live in cold climates.

✂️ d) I used to play the piano when I was a child.

✂️ e) We get used to wake up early for work.

Responda: Which sentence correctly uses used to in the affirmative form?